Refrigerator

ABSTRACT

A refrigerator is disclosed. The refrigerator includes a refrigerator body having a storage chamber defined therein, a refrigeration cycle device for cooling the storage chamber, a coolant cooler, having a coolant channel for allowing a coolant to pass therethrough, for performing heat exchange between the coolant and a refrigerant of the refrigeration cycle device to cool the coolant, a coolant supply channel for guiding the coolant cooled by the coolant cooler, a rapid cooling body, in which a beverage container receiving part is defined, having a plurality of spray holes for spraying the coolant supplied through the coolant supply channel to the outside of a beverage container, a coolant collection channel for guiding the coolant discharged from the rapid cooling body to the coolant cooler, and a circulation pump mounted on the coolant supply channel and/or the coolant collection channel for circulating the coolant.

TECHNICAL FIELD

The present invention relates to a refrigerator, and more particularly to a refrigerator having a rapid cooling body for rapidly cooling beverages.

BACKGROUND ART

Generally, a refrigerator is an apparatus that cools storage chambers, such as a refrigerating chamber and a freezing chamber, using a refrigeration cycle device including a compressor, a condenser, an expansion mechanism, and an evaporator.

In recent years, a rapid cooling chamber has been additionally formed at one side of the refrigerating chamber or the freezing chamber such that some cool air in the refrigerating chamber or the freezing chamber is supplied to the rapid cooling chamber for rapidly cooling objects to be cooled in the rapid cooling chamber.

In conventional refrigerators, however, rapid cooling time is considerably long since some cool air in the refrigerating chamber or the freezing chamber is supplied to the rapid cooling chamber. Also, objects are cooled in a state in which the objects are fixed, with the result that the objects are not moved, and the rapid cooling is delayed.

DISCLOSURE [Technical Problem]

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a refrigerator that cools a coolant using a refrigeration cycle device and directly sprays the cooled coolant to the outside of a beverage container.

It is another object of the present invention to provide a refrigerator that is capable of accelerating heat transmission between a coolant and a beverage container.

[Technical Solution]

In accordance with the present invention, the above and other objects can be accomplished by the provision of a refrigerator including a refrigerator body having a storage chamber defined therein, a refrigeration cycle device for cooling the storage chamber, a coolant cooler, having a coolant channel for allowing a coolant to pass therethrough, for performing heat exchange between the coolant and a refrigerant of the refrigeration cycle device to cool the coolant, a coolant supply channel for guiding the coolant cooled by the coolant cooler, a rapid cooling body, in which a beverage container receiving part is defined, having a plurality of spray holes for spraying the coolant supplied through the coolant supply channel to the outside of a beverage container, a coolant collection channel for guiding the coolant discharged from the rapid cooling body to the coolant cooler, and a circulation pump mounted on the coolant supply channel and/or the coolant collection channel for circulating the coolant.

The rapid cooling body may include an inner cylindrical body, through which the spray holes are formed and in which the beverage container receiving part is defined, and an outer cylindrical body surrounding the inner cylindrical body for defining an internal channel for allowing a coolant to pass therethrough between the inner cylindrical body and the outer cylindrical body.

The rapid cooling body may further include a top plate for closing an upper end of the rapid cooling body between the inner cylindrical body and the outer cylindrical body and a bottom plate for closing a lower end of the outer cylindrical body.

The coolant supply channel may be connected to the top plate.

The coolant collection channel may be connected to the bottom plate at a bottom of the beverage container receiving part.

The coolant supply channel may include a common channel connected to the coolant cooler and a plurality of branch channels connected between the common channel and the rapid cooling body.

The refrigerator may further include a vibration exciter mounted at the rapid cooling body for exciting the rapid cooling body.

The refrigerator may further include a plurality of support members mounted at a bottom of the rapid cooling body for supporting the rapid cooling body.

An example of the coolant cooler may be a heat exchanger mounted at a surface of an evaporator of the refrigeration cycle device in a surface contact manner.

Another example of the coolant cooler may be a heat exchanger connected in parallel to an evaporator of the refrigeration cycle device for performing heat exchange between a refrigerant channel, through which a refrigerant flows, and a coolant channel.

A further example of the coolant cooler may be a heat exchanger connected in series to an evaporator of the refrigeration cycle device for performing heat exchange between a refrigerant channel, through which a refrigerant flows, and a coolant channel.

DESCRIPTION OF DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view illustrating a refrigerator according to an embodiment of the present invention;

FIG. 2 is a construction view schematically illustrating the flow of a refrigerant and a coolant in the refrigerator according to the embodiment of the present invention;

FIG. 3 is a vertical sectional view illustrating the interior of the refrigerator according to the embodiment of the present invention;

FIG. 4 is an enlarged vertical sectional view illustrating a rapid cooling body shown in FIGS. 1 to 3;

FIG. 5 is an enlarged plan sectional view of the rapid cooling body shown in FIGS. 1 to 3;

FIG. 6 is a control block diagram of the refrigerator according to the embodiment of the present invention;

FIG. 7 is a construction view schematically illustrating the flow of a refrigerant and a coolant in a refrigerator according to another embodiment of the present invention; and

FIG. 8 is a construction view schematically illustrating the flow of a refrigerant and a coolant in a refrigerator according to a further embodiment of the present invention.

BEST MODE

Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings, and a detailed description thereof will be omitted.

FIG. 1 is a perspective view illustrating a refrigerator according to a first embodiment of the present invention, FIG. 2 is a construction view schematically illustrating the flow of a refrigerant and a coolant in the refrigerator according to the first embodiment of the present invention, FIG. 3 is a vertical sectional view illustrating the interior of the refrigerator according to the first embodiment of the present invention, FIG. 4 is an enlarged vertical sectional view illustrating a rapid cooling body shown in FIGS. 1 to 3, and FIG. 5 is an enlarged plan sectional view of the rapid cooling body shown in FIGS. 1 to 3.

As shown in FIGS. 1 to 5, the refrigerator according to this embodiment includes a refrigerator body 2 having storage chambers F and R defined therein, a refrigeration cycle device 10 for cooling the storage chambers F and R, and a rapid cooling device 20 for directly spraying a coolant W cooled by the refrigeration cycle device 10 to the outside of an object to be cooled to rapidly cool the object. In the following description, an object to be cooled is referred to as a beverage, and the rapid cooling device 2 directly sprays a coolant to the outside of a beverage container C.

The refrigerator body 2 includes an outer case 3, an inner case 4 disposed inside the outer case 3, the inner case 4 defining the storage chambers F and R, and doors 5 and 6 for opening and closing the storage chambers F and R, respectively.

A heat insulation material, such as foam plastic, is disposed between the outer case 3 and the inner case 4 of the refrigerator body 2. Also, a heat insulation material, such as foam plastic, is disposed in the doors 5 and 6.

As shown in FIG. 2, the refrigeration cycle device 10 includes a compressor 11 for compressing a refrigerant L, a condenser 12 for condensing the refrigerant L compressed by the compressor 11, an expander 13 for expanding the refrigerant L condensed by the condenser 12, and an evaporator 14 for evaporating the refrigerant L expanded by the expander 13 to cool the storage chambers F and R.

The compressor 11 compresses a low-temperature, low-pressure gas refrigerant L into a high-temperature, high-pressure gas refrigerant L. The compressor 11 is mounted in a machine room M defined in the refrigerator body 2 such that the machine room M is separated from the storage chambers F and R.

The condenser 12 is connected to the compressor 11 via a condenser inlet pipe 15. Also, the condenser 12 is connected to the expander 13 via a condenser outlet pipe 16. A refrigerant L, introduced from the compressor 11 via the condenser inlet pipe 15, is condensed by the condenser 12 while the refrigerant flows through the condenser 12, and is then discharged via the condenser outlet pipe 16.

The condenser 12 may be mounted at the rear of the refrigerator body 2 such that the condenser 12 is exposed to the outside. Alternatively, the condenser 12 may be mounted in the machine room M defined in the refrigerator body 2. In a case in which the condenser 12 is mounted in the machine room M, a condensing fan 12′ for blowing air outside the refrigerator body 2 to the condenser 12 is mounted in the refrigerator body 2.

The expander 13 may be embodied by a capillary tube or an electronic expansion valve. The expander 13 expands the condensed refrigerant L discharged via the condenser outlet pipe 16.

The evaporator 14 is connected to the expander 13 via an evaporator inlet pipe 18. Also, the evaporator 14 is connected to the compressor 11 via an evaporator outlet pipe 19. A refrigerant L, introduced from the expander 13 via the evaporator inlet pipe 18, is expanded by the evaporator 14 while the refrigerant flows through the evaporator 14, is discharged via the evaporator outlet pipe 16, and flows to the compressor 11.

The evaporator 14 may be configured as a direct cooling type evaporator disposed at the outer walls of the storage chambers F and R in a contact manner to directly cool the storage chambers F and R. Alternatively, the evaporator 14 may be configured as an indirect cooling type evaporator for circulating air through the storage chambers F and R and the evaporator 14 for cooling the storage chambers F and R in a circulation manner. In a case in which the evaporator 14 is configured as the indirect cooling type evaporator, a circulation fan 14′ for circulating air through the storage chambers F and R and the evaporator 14 is mounted in the refrigerator body 2.

The evaporator 14 may be embodied by a fin-tube type heat exchanger including a refrigerant pipe for allowing a refrigerant L to pass therethrough and a heat transmission fin mounted in the refrigerant pipe.

The rapid cooling device 20 includes a coolant cooler 30 for cooling a coolant W using the refrigeration cycle device 10, a coolant supply channel 40 for guiding the coolant W cooled by the coolant cooler 30, a rapid cooling body 50 for spraying the coolant W guided along the coolant supply channel 40 to the outside of the beverage container C, a coolant collection channel 60 for guiding the coolant W discharged from the rapid cooling body 50 to the coolant cooler 30, and a circulation pump 70 mounted on the coolant supply channel 40 and/or the coolant collection channel 60 for circulating the coolant W.

A coolant W is a kind of heat transmission fluid for collecting heat from a beverage and transmitting the collected heat to a refrigerant. The coolant W may be present on the outside of the beverage container, with the result that a user may ingest some of the coolant while drinking the beverage. For this reason, the coolant W is composed of salt water or a mixture of alcohol and water.

The coolant cooler 30 performs heat exchange between the coolant W and the refrigerant of the refrigeration cycle device 10 to cool the coolant W. The coolant cooler 30 has a coolant channel in which the coolant W is cooled while the coolant W flows along the coolant channel.

The coolant cooler 30 includes a heat exchanger mounted at the surface of the evaporator 14 of the refrigeration cycle device 10 in a surface contact manner. Heat from the coolant W is transmitted to the surface of the coolant cooler 30 and the surface of the evaporator 14, with the result that the coolant W is cooled.

The coolant cooler 30 may by embodied by a coolant pipe disposed at the heat transmission fin of the evaporator 14 for allowing the coolant W to flow therethrough. Alternatively, the coolant cooler 30 may include a coolant pipe for allowing the coolant W to flow therethrough and a heat transmission fin mounted in the coolant pipe in a state in which the heat transmission fin coolant cooler 30 is in contact with the heat transmission fin of the evaporator 14.

The coolant cooler 30 may be embodied by a coolant pipe for allowing the coolant W to flow therethrough. The heat transmission fin of the evaporator 14 may be provided with a refrigerant pipe through hole, through which the refrigerant pipe of the evaporator 14 extends, and a coolant pipe through hole, through which the coolant pipe extends, such that the refrigerant pipe and the coolant pipe extend through the heat transmission fin. That is, the heat transmission fin, the refrigerant pipe, and the coolant pipe may be formed as a single unit.

The coolant supply channel 40 includes a common channel 42 connected to the coolant cooler 30 and a plurality of branch channels 44 and 46 connected between the common channel 42 and the rapid cooling body 50.

The branch channels 44 and 46 distribute the coolant into a plurality of points of the rapid cooling body 50. One end of each of the branch channels 44 and 46 is connected to the common channel 42, and the other end of each of the branch channels 44 and 46 is connected to the rapid cooling body 50.

The coolant supply channel 40 is embodied by a tube or a hose for connecting the outlet of the coolant cooler 30 to the inlet of the rapid cooling body 50.

The rapid cooling body 50 has a beverage container receiving part 51 for receiving the beverage container C and a plurality of spray holes 52 for spraying the coolant W guided along the coolant supply channel 40 to the outside of the beverage container C.

The rapid cooling body 50 may be mounted in the storage chamber F and R. Alternatively, the rapid cooling body 50 may be mounted in the doors 5 and 6.

The rapid cooling body 50 includes an inner cylindrical body 53, through which the spray holes 52 are formed and in which the beverage container receiving part 51 is defined, and an outer cylindrical body 55 surrounding the inner cylindrical body 53 for defining an internal channel 54 for allowing a coolant W to pass therethrough between the inner cylindrical body 53 and the outer cylindrical body 55.

The inner cylindrical body 53 is formed in the shape of a cylinder the top and bottom of which are open. The beverage container receiving part 51 is defined in the inner cylindrical body 53.

A plurality of spray holes 52 are formed in the vertical direction of the inner cylindrical body 53 and in the circumferential direction of the inner cylindrical body 53 for spraying a coolant W to the circumference of the beverage container C in the vicinity of the beverage container C at high speed.

A jet of the coolant W is created in the vicinity of the beverage container C through high-speed spray of the coolant W through the spray holes 52 of the inner cylindrical body 53. The diameter of the spray holes 52 may be uniform toward the beverage container receiving part 51. Alternatively, the diameter of the spray holes 52 may be gradually decreased toward the beverage container receiving part 51.

The spray holes 52 of the inner cylindrical body 53 are formed such that the spray holes 52 are opened toward the center of the beverage container receiving part 51, and therefore, the coolant W, passing through the spray holes 52, is directed to the center of the beverage container receiving part 51.

That is, the rapid cooling body 50 sprays the coolant W in the direction perpendicular to the beverage container C, with the result that an impinging jet of the coolant W is maximized, thereby greatly improving heat transmission efficiency.

The outer cylindrical body 55 forms the external appearance of the rapid cooling body 50. The outer cylindrical body 55 is disposed such that the outer cylindrical body 55 surrounds the outer circumference of the inner cylindrical body 53 for defining an internal channel 54 between the inner cylindrical body 53 and the outer cylindrical body 55.

The outer cylindrical body 55 is formed in the shape of a cylinder the top and bottom of which are open.

The rapid cooling body 50 further includes a top plate 57 for closing the upper end of the rapid cooling body 50 between the inner cylindrical body 53 and the outer cylindrical body 55 and a bottom plate 58 for closing the lower end of the outer cylindrical body 55.

The top plate 57 opens the top of the beverage container receiving part 51 such that the beverage container C is received into or removed from the beverage container receiving part 51. The top plate 57 is formed in the shape of a hollow disc.

The rapid cooling body 50 further includes a rapid cooling door 59 mounted at the inner cylindrical body 53 or the top plate 57 for opening and closing the beverage container receiving part 51 to prevent the coolant W sprayed to the beverage container receiving part 51 from being discharged through the upper side of the beverage container receiving part 51.

The bottom plate 58 closes the lower end of the inner cylindrical body 53 and the lower end between the inner cylindrical body 53 and the outer cylindrical body 55. The bottom plate 58 forms the external appearance of the lower part of the rapid cooling body 50.

The center of the bottom plate 58 forms the beverage container receiving part 51 together with the inner cylindrical body 53, and the outside of the bottom plate 58 forms the internal channel 54 together with the inner cylindrical body 53 and the outer cylindrical body 55.

The rapid cooling body 50 may be configured such that the top plate 57 or the bottom plate 58 is integrally formed with the inner cylindrical body 53 or the outer cylindrical body 55.

Meanwhile, the coolant supply channel 40 and the coolant collection channel 60 are connected to the rapid cooling body 50. The coolant supply channel 40 is communicably connected to the internal channel 54 of the rapid cooling body 50, and the coolant collection channel 60 is communicably connected to the beverage container receiving part 51 of the rapid cooling body 50.

Since gravity is applied to the coolant W, it is preferable for the coolant W to be supplied through the top of the rapid cooling body 50 and to be discharged through the bottom of the rapid cooling body 50. The coolant supply channel 40 is connected to the top plate 57, and the coolant collection channel 60 is connected to the bottom plate 58, in particular, the bottom of the beverage container receiving part 51.

That is, a supply channel connection part 57 a, to which the coolant supply channel 40 is connected, is formed at the top plate 57, and a collection channel connection part 58 a, to which the coolant collection channel 60 is connected, is formed at the bottom plate 58.

The coolant collection channel 60 is embodied by a tube or a hose for connecting the outlet of the rapid cooling body 50 to the inlet of the coolant cooler 30.

In a case in which the circulation pump 70 is mounted on the coolant collection channel 60, the coolant collection channel 60 includes a rapid cooling body—circulation pump connection channel 62 for connecting the outlet of the rapid cooling body 50 to the inlet of the circulation pump 70 and a circulation pump—coolant cooler connection channel 64 for connecting the outlet of the circulation pump 70 to the inlet of the coolant cooler 30.

The refrigerator according to this embodiment further includes a vibration exciter 80 mounted at the rapid cooling body 50 for exciting the rapid cooling body 50 and a plurality of support members 90 mounted at the bottom of the rapid cooling body 50 for supporting the rapid cooling body 50.

The vibration exciter 80 excites the coolant W and the beverage using ultrasonic waves to accelerate heat transmission. The vibration exciter 80 may be embodied by an ultrasonic vibration exciter. The vibration exciter 80 may be mounted at the outside of the rapid cooling body 50 in a contact manner.

The rapid cooling body 50 is hung from the inner wall of the storage chambers F and R or spaced apart from shelves 92 mounted in the storage chambers F and R by the support members 90. The support members 90 are arranged at the bottom of the rapid cooling body 50 at predetermined intervals.

The support members 90 serve to absorb vibration or impact, which may be generated during rapid cooling of the beverage. Preferably, the support members 90 are formed of an elastic material.

FIG. 6 is a control block diagram of the refrigerator according to the embodiment of the present invention.

In this embodiment, the refrigerator further includes an input unit 100 for allowing a user to input temperature of the storage chambers or a rapid beverage cooling command and a controller 110 for controlling the refrigerator according to the input of the input unit 100 and for driving the circulation pump 70 when the rapid beverage cooling command is input through the input unit 100.

When desired temperature of the storage chambers is input through the input unit 100, the controller 110 controls the compressor 11, the condensing fan 12′, and the circulation fan 14′ based on the desired temperature input through the input unit 100 and the temperature of the storage chambers, and controls the circulation pump 70 according to the rapid beverage cooling command input through the input unit 100.

The refrigerator with the above-stated construction according to the present invention is operated as follows.

First, when a user opens the doors 5 and 6 and the rapid cooling door 59 of the rapid cooling body 50, puts a beverage container C into the beverage container receiving part 51 of the rapid cooling body 50, and closes the rapid cooling door 59 of the rapid cooling body 50 and the doors 5 and 6, the beverage container C is placed in the rapid cooling body 50.

Subsequently, when the user input a rapid beverage cooling command through the input unit 100, the controller 110 controls the circulation pump 70 to be driven.

When the rapid beverage cooling command is input in a state in which the compressor is stopped, the controller 110 controls the compressor 11 to be driven. On the other hand, when the rapid beverage cooling command is input in a state in which the compressor is driven, the controller 110 controls the compressor 11 to be continuously driven.

When the compressor is driven, a refrigerant L sequentially passes through the compressor 11, the condenser 12, the expander 13, and the evaporator 14 to cool the evaporator 14.

When the circulation pump 70 is driven, a coolant W in the coolant collection channel 60 passes through the coolant channel of the coolant cooler 30. As this time, the coolant W is cooled by the evaporator 14. After that, the coolant W passes through the coolant supply channel 40, and is then supplied to the rapid cooling body 50.

At this time, the coolant W is distributed from the common channel 42 to the branch channels 44 and 46, and is then supplied to the internal channel 54 of the rapid cooling body 50. In the internal channel 54, the coolant W is dispersed in the circumferential direction and in the downward direction. Subsequently, the coolant W is horizontally sprayed to the beverage container receiving part 51 through the spray holes 52 of the inner cylindrical body 53 at high speed.

The coolant W sprayed through the spray holes 52 at high speed is sprayed to the beverage container C in the circumferential direction of the beverage container receiving part 51 and in the vertical direction of the beverage container receiving part 51. As a result, the coolant W perpendicularly collides with the outside of the beverage container C to create an impinging jet of the coolant W.

The coolant W perpendicularly colliding with the outside of the beverage container C cools the beverage container C at high heat transmission efficiency. Since the coolant has higher density than a general gas coolant, the beverage container C is more rapidly cooled than when a gas coolant is sprayed to the beverage container C.

The coolant W colliding with the outside of the beverage container C falls due to gravity while splashing in all directions in the vicinity of the beverage container C, flows to the bottom of the beverage container receiving part 51, and is then transmitted to the coolant collection channel 60.

When the circulation pump 70 is driven as described above, the coolant W is circulated through the coolant cooler 30, the coolant channel P of the coolant supply channel 40, the internal channel 54 of the rapid cooling body 50, the spray holes 52, the beverage container receiving part 51, and the coolant collection channel 60 to directly cool the beverage container C.

Meanwhile, during the rapid cooling as described above, the controller 110 controls the vibration exciter 80 to be operated such that the vibration exciter 80 excites the rapid cooling body 50 using ultrasonic waves.

The ultrasonic waves excite a beverage contained in the beverage container C as well as the coolant W, with the result that transmission of heat from the beverage is further accelerated.

Meanwhile, when a rapid cooling stop command is input through the input unit 100, when a predetermined time elapses after the rapid cooling command, or when temperature sensed by a temperature sensor 94 mounted for measuring the temperature of the beverage container C is below a predetermined temperature level, the controller 110 controls the vibration exciter 80 and the circulation pump 70 to be stopped.

The temperature sensor 94 senses the temperature of the beverage container C in a non-contact manner. The temperature sensor 94 may be embodied by an infrared sensor. The temperature sensor 94 is mounted at the rapid cooling door 59 such that the temperature sensor 94 is spaced apart from the beverage container C or the inner cylindrical body 53.

When the vibration exciter 80 is stopped, the ultrasonic waves are not transmitted into the rapid cooling body 50. When the circulation pump 70 is stopped, the movement of the coolant W is stopped.

Subsequently, the user may open the doors 5 and 6 and remove the beverage container C cooled by the coolant W in a direct contact manner. Consequently, it is possible for the user to drink the rapidly cooled beverage contained in the beverage container C.

FIG. 7 is a construction view schematically illustrating the flow of a refrigerant and a coolant in a refrigerator according to another embodiment of the present invention.

In the refrigerator according to this embodiment, as shown in FIG. 7, a coolant cooler 30′ is embodied by a heat exchanger connected in parallel to the evaporator 14 of the refrigeration cycle device 10 for performing heat exchange between a refrigerant channel 30 a′, through which a refrigerant flows, and a coolant channel 30 b′. The refrigerator according to this embodiment is identical or similar in construction and operation to the refrigerator according to the first embodiment except the coolant cooler 30′, and therefore, a detailed description thereof will not be given.

The evaporator 14 and the coolant cooler 30′ are connected in parallel to each other via refrigerant pipes 18 and 18′ through which a refrigerant is introduced. The evaporator inlet pipe 18 is connected between the evaporator 14 and the expander 13, and the refrigerant channel 30 a′ of the coolant cooler 30′ is connected to the evaporator inlet pipe 18 via the coolant cooler inlet pipe 18′.

The evaporator 14 and the coolant cooler 30′ are connected in parallel to each other via refrigerant pipes 19 and 19′ through which a refrigerant is discharged. The evaporator outlet pipe 18 is connected between the evaporator 14 and the compressor 11, and the refrigerant channel 30 a′ of the coolant cooler 30′ is connected to the evaporator outlet pipe 19 via the coolant cooler outlet pipe 19′.

The coolant channel 30 b′ of the coolant cooler 30′ is connected to the coolant supply channel 40. Also, the coolant channel 30 b′ of the coolant cooler 30′ is connected to the coolant collection channel 60.

The coolant cooler 30′ may be embodied by a double pipe type heat exchanger configured in a structure in which one of the refrigerant and coolant channels 32 a′ and 32 b′ constitutes an inner pipe and the other of the refrigerant and coolant channels 32 a′ and 32 b′ constitutes an outer pipe surrounding the inner pipe. Alternatively, the coolant cooler 30′ may be embodied by a plate type heat exchanger configured in a structure in which the refrigerant channel 30 a′ and the coolant channel 30 b′ are alternately disposed while a plate-shaped heat transmission member is disposed between the refrigerant channel 30 a′ and the coolant channel 30 b′.

In the refrigerator according to this embodiment, the controller 110 controls a rapid cooling valve 96 when a rapid cooling command is input. When a rapid cooling mode is input, the controller 110 controls the rapid cooling valve 96 to open the coolant cooler inlet pipe 18′ and the coolant cooler outlet pipe 19′ such that a refrigerant flows to the coolant cooler 30′. When the rapid cooling mode is not input, the controller 110 controls the rapid cooling valve 96 to close the coolant cooler inlet pipe 18′ or the coolant cooler outlet pipe 19′ such that a refrigerant does not flow to the coolant cooler 30′.

In the refrigerator according to this embodiment, in a general operation in which a rapid cooling command is not input, the controller 110 controls the compressor 11, the condensing fan 12′, and the circulation fan 14′ to be driven and, in addition, controls the rapid cooling valve 96 in a closed mode. The refrigerant is circulated through the compressor 11, the condenser 12, the expander 13, and the evaporator 14. The storage chambers F and R are cooled at higher efficiency than when the refrigerant flows to the coolant cooler 30′.

On the other hand, in a rapid cooling operation in which a rapid cooling command is input, the controller 110 controls the compressor 11, the condensing fan 12′, and the circulation fan 14′ to be driven, controls the rapid cooling valve 96 in a closed mode, and controls the circulation pump 70 to be driven.

A refrigerant L sequentially passes through the compressor 11, the condenser 12, and the expander 13, and is distributed to the evaporator 14 and the coolant cooler 30′ to cool the evaporator 14 and the coolant cooler 30′. After cooling the evaporator 14 and the coolant cooler 30′, the refrigerant L is collected to the compressor 11.

A coolant W in the coolant collection channel 60 flows to the coolant channel 30 b′ of the coolant cooler 30′. At this time, heat is transmitted from the coolant W to the refrigerant L. After that, the coolant W flows to the rapid cooling body 50 via the coolant supply channel 40. The coolant W cools the beverage container C in the rapid cooling body 50, and is then collected to the coolant collection channel 60.

FIG. 8 is a construction view schematically illustrating the flow of a refrigerant and a coolant in a refrigerator according to a further embodiment of the present invention.

In the refrigerator according to this embodiment, as shown in FIG. 8, a coolant cooler 30″ is embodied by a heat exchanger connected in series to the evaporator 14 of the refrigeration cycle device 10 for performing heat exchange between a refrigerant channel 30 a″, through which a refrigerant flows, and a coolant channel 30 b″. The refrigerator according to this embodiment is identical or similar in construction and operation to the refrigerator according to the first embodiment except the coolant cooler 30″, and therefore, a detailed description thereof will not be given.

The coolant cooler 30″ may be disposed between the evaporator 14 and the expander 13 such that a refrigerant, expanded by the expander 13, passes though the coolant cooler 30″ and then flows to the evaporator 14. Alternatively, the coolant cooler 30″ may be disposed between the evaporator 14 and the compressor 11 such that a refrigerant, expanded by the expander 13, passes though the coolant cooler 30″ and then flows to the compressor 11. It is preferable for the rapid cooling device 20 to rapidly cool a beverage within predetermined time (for example, 5 minutes). Also, it is preferable for the coolant cooler 30″ to be disposed between the expander 13 and the evaporator 14.

The evaporator 14 and the coolant cooler 30″ are connected in series to each other via refrigerant pipes 18 and 18″ through which a refrigerant is introduced. The evaporator inlet pipe 18 is connected between the evaporator 14 and the coolant cooler 30″, and the refrigerant channel 30 a″ of the coolant cooler 30″ is connected to the expander 13 via the coolant cooler inlet pipe 18″.

The coolant channel 30 b″ of the coolant cooler 30″ is connected to the coolant supply channel 40. Also, the coolant channel 30 b″ of the coolant cooler 30″ is connected to the coolant collection channel 60.

The coolant cooler 30″ may be embodied by a double pipe type heat exchanger configured in a structure in which one of the refrigerant and coolant channels 32 a″ and 32 b″ constitutes an inner pipe and the other of the refrigerant and coolant channels 32 a″ and 32 b″ constitutes an outer pipe surrounding the inner pipe. Alternatively, the coolant cooler 30″ may be embodied by a plate type heat exchanger configured in a structure in which the refrigerant channel 30 a″ and the coolant channel 30 b″ are alternately disposed while a plate-shaped heat transmission member is disposed between the refrigerant channel 30 a″ and the coolant channel 30 b″.

In the refrigerator according to this embodiment, when a rapid cooling operation is performed, a refrigerant L sequentially passes through the compressor 11, the condenser 12, and the expander 13. Subsequently, the refrigerant L cools the coolant cooler 30″ while the refrigerant L passes through the refrigerant channel 30 a″ of the coolant cooler 30″. After that, the refrigerant L cools the evaporator 14 while the refrigerant L passes through the evaporator 14, and is then collected to the compressor 11.

A coolant W in the coolant collection channel 60 flows to the coolant channel 30 b″ of the coolant cooler 30″. At this time, heat is transmitted from the coolant W to the refrigerant L. After that, the coolant W flows to the rapid cooling body 50 via the coolant supply channel 40. The coolant W cools the beverage container C in the rapid cooling body 50, and is then collected to the coolant collection channel 60.

Meanwhile, the present invention is not limited to the above embodiments. In addition to beverages, ice or meat may be placed in the rapid cooling device 20 such that the ice or the meat may be rapidly cooled by the rapid cooling device 20.

As apparent from the above description, the present invention with the above-stated construction has an effect in that the coolant is directly sprayed to the outside of the beverage container, thereby more rapidly cooling the beverage in the beverage container than when the beverage container is cooled by cool air in the storage chamber.

Also, the present invention has an effect in that the coolant is sprayed to the outside of the beverage container in the form of an impinging jet, and therefore, it is possible to maximize heat transmission efficiency.

Also, the present invention has an effect in that a smaller amount of noise is generated than when a blowing fan is mounted to forcibly blow cool air in the storage chambers to the beverage container, and, in addition, it is possible to minimize power consumption.

Also, the present invention has an effect in that the coolant and the beverage contained in the beverage container are simultaneously excited, and therefore, heat transmission between the coolant and the beverage contained in the beverage container is further accelerated.

Also, the present invention has an effect in that the coolant is three-dimensionally sprayed to the outside of the beverage container in the vicinity of the beverage container, and therefore, it is possible to rapidly and uniformly cool the beverage contained in the beverage container.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. 

1. A refrigerator comprising: a refrigerator body having a storage chamber defined therein; a refrigeration cycle device for cooling the storage chamber; a coolant cooler, having a coolant channel for allowing a coolant to pass therethrough, for performing heat exchange between the coolant and a refrigerant of the refrigeration cycle device to cool the coolant; a coolant supply channel for guiding the coolant cooled by the coolant cooler; a rapid cooling body, in which a beverage container receiving part is defined, having a plurality of spray holes for spraying the coolant supplied through the coolant supply channel to the outside of a beverage container; a coolant collection channel for guiding the coolant discharged from the rapid cooling body to the coolant cooler; and a circulation pump mounted on the coolant supply channel and/or the coolant collection channel for circulating the coolant.
 2. The refrigerator according to claim 1, wherein the rapid cooling body comprises: an inner cylindrical body, through which the spray holes are formed and in which the beverage container receiving part is defined; and an outer cylindrical body surrounding the inner cylindrical body for defining an internal channel for allowing a coolant to pass therethrough between the inner cylindrical body and the outer cylindrical body.
 3. The refrigerator according to claim 2, wherein the rapid cooling body further comprises: a top plate for closing an upper end of the rapid cooling body between the inner cylindrical body and the outer cylindrical body; and a bottom plate for closing a lower end of the outer cylindrical body.
 4. The refrigerator according to claim 3, wherein the coolant supply channel is connected to the top plate.
 5. The refrigerator according to claim 3, wherein the coolant collection channel is connected to the bottom plate at a bottom of the beverage container receiving part.
 6. The refrigerator according to claim 1, wherein the coolant supply channel comprises a common channel connected to the coolant cooler and a plurality of branch channels connected between the common channel and the rapid cooling body.
 7. The refrigerator according to claim 1, further comprising a vibration exciter mounted at the rapid cooling body for exciting the rapid cooling body.
 8. The refrigerator according to claim 7, further comprising a plurality of support members mounted at a bottom of the rapid cooling body for supporting the rapid cooling body.
 9. The refrigerator according to claim 1, wherein the coolant cooler comprises a heat exchanger mounted at a surface of an evaporator of the refrigeration cycle device in a surface contact manner.
 10. The refrigerator according to claim 1, wherein the coolant cooler comprises a heat exchanger connected in parallel to an evaporator of the refrigeration cycle device for performing heat exchange between a refrigerant channel, through which a refrigerant flows, and a coolant channel.
 11. The refrigerator according to claim 1, wherein the coolant cooler comprises a heat exchanger connected in series to an evaporator of the refrigeration cycle device for performing heat exchange between a refrigerant channel, through which a refrigerant flows, and a coolant channel. 